You do not have the ability to summon a familiar or gain an animal companion.Prerequisite: Ability to summon a familiar or animal companion.Effect: You lose the ability to summon a familiar or gain an animal companion. You never gain the ability to gain a special companion, whether through animal companion, summon familiar, or some other class ability or feat.
Possessing multiple classes that would grant you an animal companion or familiar does not negate the effects of this flaw.Suggested Class/Race: SorcerersSource: Dragon Magazine #327 (Class Acts - Flaws For Sorcerers)